A broadcast scheme for vehicle-to-pedestrian safety message dissemination
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Date
2017
Journal Title
Journal ISSN
Volume Title
Publisher
International Journal of Distributed Sensor Networks
Abstract
Ensuring cooperative awareness by periodic message beaconing in vehicular environments is necessary to address pedes-
trian safety. However, high periodic basic safety message broadcasting in dense vehicular environments makes accessing
the communication channel very competitive. Furthermore, high-frequency periodic broadcasting causes fast device
energy dissipation which is a key issue for small computing devices used in wireless sensor and mobile communications.
Therefore, in order to achieve reliable message dissemination for vehicle-to-pedestrian safety, energy loss minimization
mechanisms for pedestrian mobile devices should be developed. This article proposes controlling the number of broad-
casts by eliminating periodic safety message broadcasts from pedestrian nodes; these nodes only receive broadcasts from
vehicles and then conditionally communicate with the vehicles when safety alerts are raised. When the pedestrian nodes
do not receive messages from any vehicle for a specified period, pedestrian nodes broadcast a high-priority message
advertising their position. Furthermore, for the pedestrian, adaptive message emission rates and transmission duration
are proposed based on defined vehicle-to-pedestrian separation distances. This approach reduces the pedestrian device
energy consumption and end-to-end delay and improves the packet delivery ratio compared to the vehicular broadcast
approach for safety messages defined in the IEEE 802.11 standard.
Description
Keywords
Broadcasting, Energy consumption, IEEE 802.11, Message dissemination, Pedestrian safety
Citation
Eyobu, O. S., Joo, J., & Han, D. S. (2017). A broadcast scheme for vehicle-to-pedestrian safety message dissemination. International Journal of Distributed Sensor Networks, 13(11), DOI: 10.1177/1550147717741834.